You can apply and change the interpolation
method for any keyframe. You can apply changes using the Keyframe
Interpolation dialog box, or you can apply them directly to a keyframe
in layer bar mode, in a motion path, or in the Graph Editor. You
can also change the default interpolation After Effects uses for
spatial properties.
The Keyframe Interpolation dialog box provides options
for setting temporal and spatial interpolation and—for spatial properties
only—roving settings.
In layer bar mode or in the Graph Editor, select
the keyframes you want to change.
Choose Animation > Keyframe Interpolation.
For Temporal Interpolation, choose one of the following
options:
Current Settings
Preserves the interpolation values already applied to
the selected keyframes. Choose this option when multiple or manually
adjusted keyframes are selected and you do not want to change the
existing settings.
Linear, Bezier, Continuous Bezier, Auto Bezier,
and Hold
Apply a temporal interpolation method using default values.
If you selected keyframes of a spatial layer property,
choose one of the following options for Spatial Interpolation:
Current Settings
Preserves the interpolation settings already applied
to the selected keyframes.
Linear, Bezier, Continuous Bezier, and Auto Bezier
Apply a spatial interpolation method using default values.
If you selected keyframes of a spatial layer property,
use the Roving menu to choose how a keyframe determines its position
in time, and then click OK:
Current Settings
Preserves the currently applied method of positioning
the selected keyframes in time.
Rove Across Time
Smooths the rate of change through the selected keyframes by
automatically varying their position in time, based on the positions
of the keyframes immediately before and after the selection.
Lock To Time
keeps the selected keyframes at their current position
in time. They stay in place unless you move them manually.
Using the Selection tool, do one of the following:
If the keyframe uses Linear interpolation,
Ctrl-click (Windows) or Command-click (Mac OS) the keyframe to change
it to Auto Bezier .
If the keyframe uses Bezier, Continuous Bezier,
or Auto Bezier interpolation, Ctrl-click (Windows) or Command-click
(Mac OS) the keyframe to change it to Linear.
Comments are no longer accepted for After Effects CS3. After Effects CS4 is the current version. To
discuss After Effects CS3, please use the Adobe forum.
Change interpolation method with the Keyframe Interpolation dialog box
Using the Selection tool, do one of the following:
. 
to
toggle between linear and Auto Bezier interpolation.
Comments
Comments are no longer accepted for After Effects CS3. After Effects CS4 is the current version. To discuss After Effects CS3, please use the Adobe forum.